Attachment for road rollers



April 19, 1938. F. D. WILSON ET AL ATTACHMENT FOR ROAD ROLLERS sShets-Sheet 1 Filed Jan. 15, 1934 Z/zvenia" 1 11x1422 Zeonar' April 19,1938. F. D. W ILSON ET AL' 1,114,412

ATTACHMENT FOR ROAD ROLLERS Filed Jan. 1s',-19s4 5 Sheets-Sheet 2 wil y3 4 m Illij. //////////////////////////47///// Ewenwr' April 19, 1938.F. D. WiLSON ET AL.

ATTACHMENT FOR ROAD ROLLERS Filed Jan. 13, 1934 3 Sheets-Sheet 3Patented Apr. 19, 1938 UNITED STATES PATENT OFFICE Fred D. Wilson andLeonard S. Burns, Harvey, Ill, assignors to Western-Austin CompanyApplication January 13, 1934, Serial No. 706,492

11 Claims.

The present invention relates to road rollers and more particularly toan attachment for such machines adapted to remove the waves and roughplaces from paving such as asphalt, oil macadam r, or other materialwhich may be leveled or smoothed by compression.

It is well known-that asphalt, oil macadam or other paving havingsimilar properties, be-

I comes rough and wavy and that the ordinary road roller does not havethe proper distribution of weight or mechanism whereby to compress thehumps or raised portions extending above the normal level of the roadbed, so as to fill the depressions adjacent thereto and smooth or level15 the entire road surface. In other words, adjacent every hump orraised portion will be found a depression from where the materialforming the hump has been taken. It is necessary to again replace thematerial taken from such depression so as to smooth or level the surfaceof the road bed and it is therefore an object of the present inventionto provide a novel mechanism for compressing the raised portions inaroad bed whereby to level or replace the surface.

It is a further object of the present invention to provide an attachmentfor the commercial road rollers which in no Wise interferes with itsnormal operation, and which when in operative position, efiicientlysmooths the waves and rough places in a paving.

Another object of the present invention is the provision of anattachment for road rollers which may be readily placed or moved tooperative or inoperative position at the will of the operator. Theplacing of the attachment in inoperative position may be desirable forfacilitating the steering of the roller around corners or for certainkinds of work.

Still another object of the invention is the provision of an auxiliaryroller placed intermediate the front and rear rollers of a commercialtractor for the purpose of smoothing the material forming the surface ofthe road bed.

Yet another object of the present invention is to provide a novelauxiliary roller actuated by an hydraulic system initiated by theoperator from his station on the road roller.

Another object of our invention is to provide 50 an auxiliary rollerthat may be readily moved into and out of operative position, and stopmeans or abutments carried by the frame and adapted to take the thrustfrom the roller carrying arms when the auxiliary roller is in operativeposition, 55 the power applying means maintaining the arms in firmcontact with the stop means or abutments when the roller is in operativeposition.

Further objects are to provide a construction of maximum simplicity,emciency, economy and ease of assembly, and such further objects, ad- 5vantages and capabilities as Will later more fully appear, and areinherently possessed thereby.

The invention further resides in the combination, construction andarrangements of parts i1- lustrated in the accompanying drawings, andwhile there is shown therein a preferred embodiment, it is to beunderstood that the same is susceptible of modification and change andcomprehends other details and constructions, without departing from thespirit of the invention. 15

In the drawings:

Fig. 1 is a view in side elevation of the machine or road rollerprovided with the novel attachment; I

Fig. 2 is a top plan view of the construction dis closed in Fig. 1; 20

Fig. 3 is a view in vertical cross section taken in I a planerepresented by the line 3-3 of Fig. 1.;

Fig. 4 is a fragmentary view in side elevation of the rollers andshowing their alignment;

Fig. 5 is a view in side elevation similar to Fig. 1, but disclosing analternate mechanism for operating the auxiliary roller; 7

Fig. 6 is a fragmentary top plan view of the mechanism shown in Fig. 5.0

Referring more particularly to the disclosure in the drawings, the roadmachine or road roller I is provided with rear driving rollers 2 andfront steering rollers 3, the front rollers being steered by means of asteering shaft 4 and steering wheel 5 located at the operators station.The opposite sides of the main frame are formed as plates 6 which aresuitably secured together and to the front and rear wheels or rollers.

Passing through these plates 6 is a stationary shaft I secured to theopposite sides of the frame by means of bracket members 8. In thepresent instance, said securing means comprises bolts 9, the mounting ofthis shaft being such as to sustain the entire weight of the machine.Pivotally mounted on the opposite ends of the shaft 1 are arms ID, thelower ends Ifla of which are provided with bearing brackets I5detachably secured thereto by a plurality of bolts Me, which bracketsare rigidly secured to and carry a shaft II which in turn carries anovel auxiliary roller I 2 through the medium of roller bearings I3.

The opposite ends M of the shaft II are each received and seat in thebearing bracket IS. A look nut I6 is threaded onto the opposite ends ofthe shaft H to retain the arms l and maintain the shaft H in rigidposition thereon.

Mounted directly above the roller l2 and secured to the opposite sides 6of the main frame by means of bolts or the like l6a, are provided guidemembers I! for controlling the lateral position of the arm ll] relativeto the frame of the machine. The bolts lBa, there being one at each endof the guide member [1, permit ready adjustment thereof. A stop memberHat is provided adjacent the rear end of each guide member, to limit therearward movement of the arms l0 and also receive the thrust andpressure of the arms Ifl when the road roller is moving forwardly.Intermediate the opposite ends thereof, the arm ill is provided with alug [8 to which is pivotally attached at H) a piston rod 20 operated byoil or other hydraulic fluid through the medium of a piston within acylinder 2! at each side of the main frame. Each cylinder is pivotallymounted on a shaft 22 which is rigidly attached to the opposite sideplates 6 of the main frame in any suitable manner.

The hydraulic system comprises a pump 23 driven by a shaft 24 on apulley 25, the latter in turn being rotated by means of a belt 26 andpulley 21 driven by a shaft 28 connected to the transmission of theengine. Pipes or conduits 29 and 30 lead from the pump to a manifold 3!.From the manifold, pipes or conduits 32, 32a and 33, 33a lead to each ofthe cylinders 2!. The manifold 3| is provided with a valve operated bythe lever or rod 34 and handle 35 positioned adjacent the operatorsstation at the rear of the machine. The flow of oil or fluid from thepump is controlled through the valved manifold 3| and pipes 32 and 32awhen the pistons and piston rods 20 are pushed outwardly or, in otherwords, when they move toward the arms Hi.

When it is desired to move the arms In in the opposite direction, theoil or fluid is released and allowed to flow back through the pipes 32aand 32, by means of the valve within the manifold 3| and then flowsthrough the pipes 33 and 33a 4. which are in communication with theopposite side of the pistons in the cylinders 2|. To permit movement ofthe cylinders 2| with reference to the frame, a section of each of thepipes or conduits 32a and 33a is made flexible. Continued operation ormovement of the pistons and piston rods 20 in the direction of the frontsteering wheel 3 lifts the roller [2 to the position shown in dottedoutline in Fig. l of the drawings.

When the roller I2 is in the position shown in dotted outline in Fig. 1,it is entirely inoperative and the road machine or road roller may beemployed for all of its regular purposes. When the auxiliary roller isplaced in the position shown in full outline in Figs. 1 and 4, thisauxiliary roller functions to smooth out and level the road surface. Asclearly shown in Fig. 4 of the drawings, the front, rear and auxiliaryrollers are all in alignment or in a straight line or plane tangent toall three of the rollers.

In Figs. and 6 there is disclosed an alternate mechanism for carryingand operating the auxiliary roller. In this embodiment, each cylinder2la, there being one on each side of the machine, is pivotally connectedat 35a to a bracket 36 which in turn is mounted on the stationary shaft7 and carries the arm H] which carries the auxiliary roller H2. Thepiston rod 37 of each cylinder is connected to a pin 38 joining links 39and 4B of a toggle arrangement. The other end of the link 39 is pivotedon a stationary shaft M, while the other end of the link 45 is pivotedat 42 upon a lug 43 formed or provided on each arm I0. By reason of thisconstruction, no stops are necessary on the guide members i! since thelinks 39 and 40 to which the piston rods are attached, act both as acontrolling and as a raising member. In order to add to the rigidity ofthe shaft 4|, a bracket 4 is secured to each side 6 of the frame and tothis shaft.

In this alternate construction, when the pistons and piston rods 31 areforced outwardly, the aux iliary roller is raised from its operativeposition as shown in full lines in Fig. 5, to the dotted line positionof this same figure.

It will be apparent that when a hump or raised portion is engaged by theauxiliary roller, the greater portion of the entire weight of the roadmachine or road roller is placed upon this auxiliary roller or appliedthereto so as to compress the raised surface of the road bed and thusmove or displace the same. It is a well known fact that wherever araised portion or hump occurs in a paving such as asphalt, oil macadamor the like, a depression is always found adjacent thereto. In otherwords, the material taken from the depression forms the raised portionorhump. By means of the present invention, the auxiliary roller bycompressing this huinp or raised portion will again place the roadsurface or paving in its original position. In the ordinary road rollerhaving but the front steering wheels and rear drive wheels forcompressing or smoothing the surface, when either of these wheels orrollers engages the hurnp or raised portion, it will merely roll overthe same, the frame being tilted in proportion to the conditon of thesurface over which the wheels are running since there is nothing aboutthe machine which will cause it to roll in a straight or level path withrelation to the road surface. This is true either when build ing a newroad or when repairing an old one.

Should there be weight enough added to the vehicle as a whole tocompress a ridge or hump when the machine passes thereover, that sameweight would be constantly present and would compress the entire surfacein like proportion. By means of the present attachment or auxiliaryroller which is vertically, rigidly mounted when in operative positionand capable of sustaining the entire weight of the machine if necessary,it is possible to apply all or the greater portion of the weight of theroad roller or machine through the medium of the auxiliary roller so asto compress the raised portion or hump occurring in the surface of thepavement.

It will be readily apparent that the invention comprehends a novelattachment for road rollers or road machines and which greatly adds tothe utility thereof.

Having thus disclosed the invention,

We claim:

1. In a road vehicle having a wheeled frame; arms journaled on the frameadjacent the center of the vehicle; a ground roller carried by the lowerends of said arms adapted to support the greater portion of the weightof the vehicle when the roller is in operative position contacting withthe ground; abutments carried by the frame adapted to take the thrustfrom the arms and to fix the operative position of the roller; and meansfor simultaneously pivoting the arms through equal arcs, said meansmaintaining said arms in firm contact with the abutments when the rolleris in operative position; said abutments and means coacting to rigidlysupport the arms with respect to the frame.

2. In a road vehicle having a wheeled frame; arms iournaled on the frameadjacent the center of the vehicle; a ground roller carried by the lowerends of said arms adapted to support the greater portion of the weightof the vehicle when the roller is in operative position contacting withthe ground; abutments carried by the frame adapted't'o take the thrustfrom the arms and to fix the operative position of the roller; means forsimultaneously pivoting the arms through equal arcs, said meansmaintaining said arms in firm contact with the abutments when the rolleris in operative position; said abutments and means coacting to rigidlysupport the arms with respect to the frame; and a bearing bracketdetachably secured to the lower end of each of said arms, said rollerbeing rotatably mounted between said bearing brackets.

3. In a road roller provided with a frame and front and rear rollers; apair of arms swingably mounted on said frame, one on each side thereofintermediate the front and rear rollers; bearing brackets detachablysecured to the lower portion of said arms; a roller rotatably supportedbetween said bearing brackets; fluid pressure means to simultaneouslyswing said arms and roller into and out of contact with the surface tobe rolled; and stop means on the frame against which the arms abut whenroller is in contact with the surface to be rolled.

4. In a road roller provided with a frame and front and rear rollers,arms swingably mounted on the frame and positioned one on each side ofthe machine intermediate of the front and rear rollers, an auxiliaryroller rotatably mounted on the lower portion of said arms, said armsbeing swingable together from approximately a vertical position with theauxiliary roller in rolling contact with the surface being rolled to aninclined position with the auxiliary roller out of contact with thesurface being rolled, power means connected to each of said arms forsimul taneously swinging said arms from said approximately verticalposition to said inclined position, and vice versa, said auxiliaryroller and arms being so constructed and arranged as to carry thegreater part of the weight of the machine when the auxiliary roller isin operative engagement with a resistant hump in the surface beingroll-ed so that the weight on the auxiliary roller will compress thehump and smooth the surface being rolled.

5. In a road roller provided with a frame and front and rear rollers, apair of arms swingably mounted on said frame and arranged one on eachside thereof intermediate of the front and rear rollers, an auxiliaryroll-er rotatably carried by the lower portion of said arms, said armswhen the auxiliary roller is in operative position occupyingapproximately a vertical position in or adjacent to a transversevertical plane passing through the center of gravity of the machine,said arms being swingable from approximately a vertical position withthe auxiliary roller in contact with the surface being rolled to aninclined position with the auxiliary roller out of contact with thesurface being rolled, power means connected to said arms forsimultaneously swinging them into and out of approximately verticalposition to carry the auxiliary roller into or out of contact with thesurface being rolled, the said arrangement of the arms when theauxiliary roller is in operative position, causing the greater part ofthe weight of the machine to be thrown upon the auxiliary roller whenthe auxiliary roller is in operative engagement with a resistant hump inthe surface being rolled, to compress the hump and level said surface.

6. In a road roller provided with a frame and. front and rear rollers, apair of arms swingably carried by said frame one on each side thereofintermediate the front and rear rollers, an auxiliary roller carried bythe lower portion of said arms, said arms when the auxiliary roller isin operative position occupying substantially a vertical position in oradjacent to a transverse vertical plane passing through the center ofgravity of the machine, said arms being swingable from a substantiallyvertical position with the auxiliary roller in contact with the surfacebeing rolled to an inclined angular position with the auxiliary rollerout of contact with the surface being rolled, power means connected tosaid arms for simultaneously swinging them into and out of substantiallyvertical position to carry the auxiliary roller into and out of contactwith the surface being rolled, the arms taking substantially the entirethrust from the auxiliary roller during operation of the latter, wherebyhumps or irregular upstanding portions of a roadway may be rolled to asubstantially smooth surface,

and when a hump of sufficient resistance is contacted by the auxiliaryroller the latter will receive the greater party of the weight of themachine, and stop members with which said arms contact when theauxiliary roller is in operative engagement with a hump or upstandingportion.

7. In a road roller having a frame and front and rear rollers, a pair ofthrust arms swingably mounted on the frame one on each side thereofintermediate of the front and rear rollers, a bearing block on the lowerend of each of said arms, an auxiliary roller rotatably mounted betweensaid bearing blocks to transmit the upward thrust of the auxiliaryroller to said arms, said arms when the auxiliary roller is in theposition of maximum thrust occupying substantially a vertical position,said arms being swingable from a substantially vertical position withthe auxiliary roller in contact with the surface being rolled to aninclined position with the auxiliary roller out of contact with thesurface being rolled, fluid pressure means comprising piston rodspivotally connected to said arms for simultaneously swinging them intoor out of contact with the surface being rolled, and means fordetachably securing the bearing blocks to the lower ends of said arms.

8. In a road roller having a frame and front and rear rollers, a pair ofthrust arms swingably mounted on the frame one on each side thereofintermediate of the front and rear rollers, a bearing block detachablysecured to the lower end of each of said arms, an auxiliary rollerrotatably mounted between said bearing blocks to transmit the upwardthrust of the auxiliary roller to said arms, said arms when theauxiliary roller is in the position of maximum thrust occupyingsubstantially a vertical position, said arms being swingable from asubstantially vertical position with the auxiliary roller in contactwith the surface being rolled to an inclined position with the auxiliaryroller out of contact with the surface being rolled, fluid pressuremeans comprising piston rods pivotally connected to said arms forsimultaneously swinging them into or out of contact with the surfacebeing rolled, and stop members for said arms, said stop member beingadapted to be contacted by said arms when the auxiliary roller is inoperative engagement with a resistant hump in the surface being rolled.

9. In a road roller provided with a frame and having steering anddriving rollers, a rigid shaft transversely mounted in said frameintermediate of the steering and driving rollers, the ends of the shaftextending beyond the sides of the frame, a pair of arms mounted one oneach end of said shaft, a bearing block detachably bolted to the lowerend of each of said arms, an auxiliary roller rotatably mounted betweensaid bearing blocks, said arms being swingable with relation to theframe to carry the auxiliary roller into and out of contact with thesurface being rolled, a fluid pressure cylinder pivotally mounted oneach side of said frame, each of these cylinders having a piston rodpivotally connected to said arms respectively for simultaneouslyswinging said arms to bring the auxiliary roller into and out of contactwith the surface being rolled, that portion of said arms between theends of said rigid shaft and the auxiliary roller occupying asubstantially vertical position when the auxiliary roller is inengagement with a resistant hump, and stop members one on each side ofthe frame against which said arms are adapted to abut when the auxiliaryroller is in engagement with a resistant hump in the surface beingrolled.

10. In a road roller provided with a frame and the usual steering anddriving rollers, a pair of arms swingably mounted on the frame andpositioned one on each side thereof intermediate of the steering anddriving rollers, an auxiliary roller carried by the lower portion ofsaid arms, said arms occupying a substantially vertical position whenthe auxiliary roller is in contact with the surface being rolled, powermeans for swinging said arms into and out of said substantially verticalposition, and stops fixed to said frame against which the arms abut whenin position for rolling operation of the auxiliary roller, whereby thepower means may swing the arms into and away from contact with saidstops, and the stops receive the lateral thrust from the arms when theauxiliary roller is in operation with the machine moving forward.

11. In a road roller having a main frame and the usual steering anddriving rollers, an auxiliary frame carrying an auxiliary roller mountedbetween the steering and driving rollers, said auxiliary frame androller having both operative and inoperative positions, the operativeposition being when the said auxilary roller is in contact with thesurface being rolled, means for moving said auxiliary frame andauxiliary roller into and out of operative position and stop meanscarried by the main frame to locate the said auxiliary frame and theauxiliary roller when in an operative position and to resist thrustduring the forward movement of the road roller.

FRED D. WILSON. LEONARD S. BURNS.

